1) PHP Storm (30 days free) 
   https://www.jetbrains.com/phpstorm/download
2) Sublime Text (Free)
   https://www.sublimetext.com/download
3) Netbeans (Free)
   https://netbeans.apache.org/download/index.html
4) Atom (Free)
   https://atom.io/
5) CodeLobster ()
   http://www.codelobster.com/download.html